Sliding door



A. JAEGER, SR.

SLIDING DOOR.

APPLICATION FILED SEPT. 6, I9I9.

Patented Oct. 5, 1920.

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i Application led September 6, 1919.

To aZ whom if may concern Be it known that I, AUGUST JAGER, Sr., a citizen of the United States, residing at Grand Rapids, in the county of Kent and State of Michigan, have invented certain new and useful Improvements in Sliding Doors, of which the following is a specification.

My invention relates to hangings for sliding doors, and especially for sliding car doors for use upon freight cars, and its objects are: first, to provide a means whereby the door may be easily slid and without undue friction; second, to so arrange the antifriction elements of my invention that they may be utilized to hold the door permanently in place when opened or closed, and, third, to provide a means whereby the antifriction elements may be brought into effective use without great effort on the part of the operator.

I attain these objects by the mechanism and arrangement of parts shown in the accompanying drawing, in which-Figure l is an elevation of a part of one side of a freight car with the door antifriction elements in anchored position. Fig. 2 is a sectional "end view of Ythe car door showing the manner of hanging the same, and, Fig. 3 is a strip taken from the bottom of the door and having parts cut away to show the positions ofthe antifric tion elements, or wheels, and how aA spring may be applied to ease the movement of the wheels from their anchored positions to the upper edge of the supportingrail without too great effort on the part of the operator.

Similar reference numerals indicate similar parts throughout the several views.

In the hanging of this door my first act is to provide supporting rails,4, for the upper end of the door. To prevent the door from moving sidewise out of position I place an auxiliary rail 4 opposite the rail 4 and then form a groove 8 into 'each side of the door, with a cap 5 in position to be made to rest upon the rail 4 when the door is in its anchored positions.

The antifri'ction elements consists of wheels 6 revolubly mounted in the lower edge of the door, and flanged, as shown in Fig. 2, so that when being run over the rail 2 the lower edge of the door will be held securely against lateral movement. It will be readily understood that the rails 2 and 4 may be. applied to hold the door closely Specicatoniof Letters Patent.

in place and the.

Patented Oct. 5, 1920.- serial No. 322,192.

wheels are to drop when the door is either in A opened position, or in closed position, as indicated by its solid lines, and by its dotted lines 3, respectively in Fig. l. There may be three, or four of these depressions, or even more, if desired, according 'to the length of the door.

In Fig. 3 I have shown how a spring 9 may be applied for the purposes: first, of avoiding a heavy shock upon the wheels 6 when they drop into the depressions 7, and, second, to partly support the door when in anchored-position, and at the same time to assist in raising the door sufficiently to carry the wheels upon the highest plane of the rail 2, for traveling over the rail to open or close the door, as indicated by the dotted lines 3, in Fig. l.

he spring 9 is designed to support none of the weight of the door except when the wheels 6 have passed into the depressions 7 in the lower track. The neck 8 at the top of the door must be long enough to allow of all necessary raising and lowering of 4the door as the wheels 6 pass out of the depressions and travel along upon the track. The cross head 5 above the neck 8 is designed to rest upon the upper bearings or tracks 4 4 depressions, as indicated at 3 and 5 in Fig.

1 and, in connection with the support of the spring 9, to support of the door andrelieve the wheels vand their bearings.

The tracks 4 4 and 2 should be so located that the door cannot possibly come in contact with the wall l when opening and closing the door.

Vhat l claim as new in the art, is:

1. In combination with a slidingdoor, a single track below the door having depressions therein, wheels revolubly mounted in the lower cnd of the door to travel on the lower track, and engage the depressions therein, and two parallel tracks at the upper end of the door, forming a slot between them, a cross head at the upper end of the door arranged the cross head and the body of the door, said cross head so adjusted that it will move clear of the tracks when sliding the door and will restupon the tracks when the entire weight when the wheels are in they the weight from to form a slim neck between 'ing depressions at given points therein,

wheels revolubly mounted in the lower edge of the door and fitted to travel upon the edge of the track and support the door when sliding it open or closed, and to enter said depressions when in proper position there- Jfor, a cross head at the upper end of the door having a thin slim neck, said Cross head arranged to move freely with the door when sliding the door, two parallel tracks at the upper end of the door forming a slot `for the free passage of the neck, the door so adjusted that the cross head will rest upon athe upper tracks when the wheels are in the depressions in the lower track, and springs in the lower edge of the door arranged to contact the lower track and ease the door in its downward movement as the wheels enter the depressions in the lower track.

Signed at Grand Rapids, Michigan, September 1, 1919.

AUGUST JAEGER, SR.. 

